Monday, May 23, 2016

Catalonia: Enterovirus Outbreak Hospitalizes 29 Children

#11,394

For the past several days Spanish media in Catalonia - in the Northeast of Spain - has been reporting on a growing number of children hospitalized with neurological symptoms associated with enterovirus infection.

The outbreak appears to have started in the middle of April, and has affected at least 60 children, with today's reports saying 29 are currently hospitalized.

An outbreak of an enterovirus that can cause severe illness has
already affected 60 children in Catalonia, according to the most recent
figures released by the regional health department.

Of these, 29 were hospitalized after suffering a form of
encephalitis, which causes inflammation of the brain stem and
cerebellum. Health authorities said most of the children are recovering
well, although two remain in a serious condition.

Similar outbreaks have been reported in Bulgaria, the United States
and several Asian countries, but this is the first time Spain has
experienced so many cases at the same time.

It’s behaving differently from what we usually see, and it is hard to know what to expect - Carles Rodrigo, Vall d'Hebron Hospital chief of pediatrics

(SNIP)

Experts have ruled out the presence of EV-D68 in all 48 cases reported
since April 13, when the first case arrived at the emergency room of
Vall d’Hebron Hospital in Barcelona. That child, who went into cardiac
arrest, remains in hospital with “serious effects,” according to Carles
Rodrigo, head of pediatrics at the hospital. Most of the other cases
were reported in May.

The first results of the Microbiology Department of
Vall d'Hebron on Thursday revealed that serotype detected in two
patients is the A71, a strain that particularly affects the central
nervous system and causes romboencefalitis. In 15
cases, the microbiological studies have also found that it is an
enterovirus group A, despite missing serotype specify what exactly that
will be announced in the coming days.

Hopefully we'll get clarification from the ECDC or some other official source in the next few days. There is no mention of this outbreak in the most recent Communicable disease threats report from the ECDC.

Assuming for the moment that the cause is EV-71 . . . .

Human Enterovirus 71 (EV-71) – which is most often reported in Asia and the Western Pacific region - is one of more than 60 non-polio enteroviruses (NPEVs) known to cause cause human illness, and that primarily affect children under the age of 10.

Although
EV-71 was first described in a California infection in 1969, and
outbreaks of EV-71 associated HFMD were recorded in Europe, North
America, and Australia back in the 1970s (seeBMJ article onChallenges of EV-71) the genotypes circulating in Asia today have evolved to become more virulent than those of 40 years ago.

As
with many other infectious diseases, there are genuine concerns that
EV-71 may, through repeated introductions via international travel,
spread beyond Asia and the Pacific to get a foothold in Europe and North
America.

As we saw two summers ago with EV-D68, when introduced into an
immunologically naive population, enteroviruses have the potential to
spread rapidly.

While large EV-71 outbreaks have not occurred outside of Asia yet,
there is no good reason why they couldn’t in the future. So we'll keep an eye on this outbreak, and any signs it may be spreading beyond Catalonia.